How should I practice Score Points?

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Score Points

Google● EasyNEW GRADOA

Problem statement

There is a board with N cells (numbered from 0 to N-1) arranged in a row. The board is described by an array points and a string tokens, both of length N. The K-th cell of the string tokens is either 'T' or 'E', indicating whether the K-th cell contains a token or is empty.

If the K-th cell contains a token, we assign the number of points equal to points[K]. Additionally, we score another for every pair of adjacent tokens. The goal is the total number of points we score?

𓂃 ོ𓂃Big shoutout to Aura Man for all the support! 🐳𓂃 𓈒𓏸

Function

scorePoints(points: int[], tokens: String) → int

Examples

Example 1

points = [3, 4, 5, 2, 3]tokens = "TEETT"return = 9

Cells 0, 3 and 4 contain tokens. The sum of points in these cells is 8. Also, there is one pair of adjacent cells with tokens, which result in 1 extra point. The function should return 9.

Example 2

points = [3, 2, 1, 2, 2]tokens = "ETTTE"return = 7

Cells 1, 2 and 3 contain tokens. the sum of points in these cells is 5. Also there are two pairs of adjacent cells with tokens, which results in 2 extra points. The function should return 7 :)

Example 3

points = [2, 2, 2, 2]tokens = "TTTT"return = 11

All cells contain tokens. The function should return 11 :)

Constraints

array points and string tokens are of the same length N;
N is an integer within [1, 100];
each element of array points is an integer within the range [1, 1,000];
string tokens consists only of the characters 'E' and/or 'T'.